True, but what's your point? Both major parties have changed beyond recognition since the 1960s. The Whitlam era saw the ALP become a true progressive party (with only Mark Latham's elevation to leader being a throwback to darker times). Howard, drove the "liberals" out of the Liberal Party (but Turnbull snuck in despite the prevailing ethos).
"Old school" members of both parties find themselves isolated and increasingly shunned. Look at recent defections from the NSW ALP to One Notion, the ALP abandoning Fitzgibbon, the unceremonious dumping of "small l" Libs in preselection and the rise of "teals" in former Lib strongholds. Only a few right-wing unionists continue to carry the "traditional", "DLP" or "Calwell" banners in the ALP and the LIbs keep a few token progressives to roll out when they need to show that they're not all white nationalist culture warriors. This leaves a large number of people politically homeless and is one of the factors behind the declining primary vote of both the Labor and Liberal Parties.
The Independents and minor parties are currently filling the gaps and, IMO, will continue to benefit from the nature and "corporatism" of the majors. Sky and NewsCorp generally have a stranglehold on the Libs and will not let them change tack or even revert to Menzies' Liberalism (while invoking the ghost Ming at every opportunity). Labor has unfortunately convinced itself that a "softly, softly" approach to key issues is necessary for it to be competitive and will only attempt modest reform of key sectors rather than rock the boat.
